Overhead trolley-track.



No. 868,932. PATENTED OCT. 22. 1907.

' J. H. LAWRENGE.

OVERHEAD TROLLEY TRACK.

APPLICATION FILED JULY16,1907.

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UNITED STATES PATENT OFFICE.

JOHN H. LAWRENCE, OF STERLING, ILLINOIS, ASSIGNOR OF ONE-HALF TO EDWIN F. LAWRENCE, OF STERLING, ILLINOIS.

OVERHEAD TROLLEY-TRACK.

Specification of Letters Patent.

Patented Oct. 22, 1907.

Application filed July 16, 1907- Serial No- 384,094.

To all whom it may concern:

Be it known that IJJOHN H. LAWRENCE, a citizen of the United States of America, and a resident of Sterling, in the county of Whiteside and State of Illinois, have invented certain new and useful Improvements in Overhead Trolley-Tracks, of which the following is a specification.

This invention relates to the overhead type of trolley tracks for hanging horizontally sliding doors and the like, and has for its object to provide a simple and efficient structural formation of the track, adapted to afford a maximum degree of strength and rigidity with a minimum amount of material, and with which the track wheels are maintained in proper longitudinalcentral-relation with an entire avoidance of the track wheels and their trucks with the vertical wall of the track, all as will hereinafter more fully appear.

In the accompanying drawings :Figure 1, is a transverse section on line Fig. 2 of an overhead trolley track embodying the present invention. Fig. 2, is a fragmentary elevation of the same with parts in section on line .ra: Fig. 1.

Referring to the drawings, 1 represents a portion of the present overhead trolley track, and which in detail comprises the usual pair of opposed vertical walls 2, 2, connected together at top by the horizontal web 3, and having their lower ends turned inwardly and upwardly to form a pair of longitudinal trough shaped runways or tracks 4, 4, for the track wheels by which a door or the like is supported. With the described arrangement a longitudinal gap is left between said runways to permit of the movement of the pendent comprises the formation of the aforesaid vertical walls 2, with inwardly and downwardly extending offsets 5, the lower ends of which merge into secondary vertical walls 6 forming parts of the runways, 4, as shown.

With the described construction great rigidity is imparted to the overhead trolley track in both a vertical and a horizontal direction and at the same time the runways are disposed away from the side walls 2, so that the liability of the track wheels and their trucks having frictional contact therewith is avoided.

Having thus fully described my said invention what I claim as new and desire to secure by Letters Patent, is: V p

1. An overhead trolley track provided with counterpart upturned lower portions to form trough shaped runways which are separated by a longitudinal gap, and formed with longitudinal offsets intermediate of said runways and the side walls of the track, substantially as set forth.

2. An overhead trolley track provided with counterpart upturned lower portions to form trough shaped runways which are separated by a longitudinal gap, and formed with inwardly and downwardly extending longitudinal ofisets intermediate of said runways and the vertical side walls of the track, substantially as set forth.

Signed at Sterling, Illinois, this 13th day of July 1907.

JOHN H. LAWRENCE.

Witnesses ROBERT BURNS, HENRY Mon. 

